Drinking mug



FIG. 1 is a perspective view of the drinking mug embodying my ornamentaldesign;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a drinking mug, substantially as shown anddescribed.